Portable lamp structure



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PORTABLE LAMP STRUCTURE Filed Aug. 17, 1951 5 Sheets-Sheet 2 IN VEN TOR.uild 8. M

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PORTABLE LAMP STRUCTURE Filed Aug. 17, 1951 5 Sheets-Sheet 5 INVENTOR.7110148. 7714444 XWW) Aug. 16, 1955 M. E. MACKSOUD 2,715,575

PORTABLE LAMP STRUCTURE 5 Sheets-Sheet 4 Filed Aug. 17, 1951 INV NTOR.'muws. mufwl l (many. mmwm Aug. 16, 1955 M. E MACKSOUD 2,715,675

PORTABLE LAMP STRUCTURE Filed Aug. 17,1951 5 Sheets-Sheet 5 Ozz 7 d'iiy.10

United States Patent Ofiice 2,715,675 Patented Aug. 16, 1955 PORTABLELAMP STRUCTURE Michel E. Macksond, Bronxville, N. Y.

Application August 17, 1951, Serial No. 242,335

14 Claims. (Cl. 240-4) The present invention relates to a portable lampstructure suitable for use as a sun health lamp, or for other purposes,and more particularly to an improved combined portable carrying case andreflector structure adapted to contain plug-in lamp supporting elementsand plugin ballast supporting elements in a complete, unitary structureof pocket size.

I am aware that portable pocket size sun lamp structures are generallyold. However, the portable pocket size lamp structures of the prior artwith which I am familiar have a number of disadvantages which, in myopinion, limit their usefulness and cause them to be somewhatimpracticable from an economic standpoint.

It is therefore a principal object of my invention to provide acomplete, portable, pocket size combined carrying case, lamp structureand reflector, which, when opened for use, automatically positions thelamp and reflectors in the correct relation for the most efficientproduction and direction of radiant energy.

Another object of my invention is to provide an improved form ofportable lamp carrying case and reflector structure which may be openedfrom a closed position to an open position whereby the inner wallsurfaces of the case function as reflective surfaces, the carrying casebeing provided with a spring supporting clip, which, when positioned tosupport the case from an external projection, also functions toaccurately position the angular relationship of the reflective surfacesand the radiation source.

Another important object of my invention is to provide an improvedportable lamp carrying case and reof glass having various desiredradiation filtering properties to enhance the production of desiredradiation frequencies from the lamp structure.

It is therefore another very important object of my invent on to providean improved form of removable radiation source adapted to be pluggedinto the novel combined portable carrying case and reflector structure,the radiation source comprising an outer light filtering envelope havingexternal prong electrical connectors for flector structure havingsupporting elements for a lamp and lamp ballast arranged for plug-inreplacement of the lamp or lamp ballast, together with an arrangementfor the plug-in connection of a line cord to the supporting elements insuch manner that the entire supporting elements, together with theelectrical connections for the lamp and lamp ballast, may beconveniently and compactly formed in a single socket element of simpleconstruction and low cost.

Yet another object of my invention is to provide an improved form ofplug-in ballast resistor for use with the combined portable lampcarrying case and reflector of my invention.

The portable lamp carrying case and combined reflector of the presentinvention may be used with various types of plug-in radiant energygenerators or lamp units which for a few examples may be mentioned asblack light lamps, germicidal lamps, medical ultra-violet lamps,electronic repeater flash lamps, photo-flood lamps, and photo-flashlamps. When using the portable carrying case and reflector structure ofthis invention with a source plug-in connection to the carrying casesupporting elements and containing an inner mercury vapor arc tubetogether with a thermostatic starting switch arranged within the lightfiltering envelope in a novel and efl icient manner.

Still another object of my invention is to provide an improved andsimplified plug-in socket or supporting structure having in a single,unitary form, the electrical coirnections and the plug-in receptaclesfor a lamp source of radiant energy, plug-in receptacles for a plug-inform of lamp ballast resistance, and plug-in connections for adetachable line cord; the entire supporting structure adapted to becarried within the combined portable lamp carrying case and reflector ofmy invention.

In the preferred form of my invention the carrying case may be comprisedof two half-sections hinged together and adapted to open much in themanner of a book, with the inner reflective surfaces of the case in adesired geometrical position for efliciently reflecting the radiationsfrom the lamp or radiation source in the desired directions. The hingejoining the two half-sections of the case is also arranged to pivotallysupport a channel frame member from which is carried the socket elementor receptacle support for the plug-in radiation source or lamp, plug-inballast resistor, and detachable line cord. The channel frame member isso inter-connected with the hinge, that the opening movement of the twohalf-sections of the case automatically positions the frame membercarrying the socket element together with the plug=in lamp supportedthereby at an intermediate erected position between the two reflectivesurfaces of the opened carrying case. An additional fine adjustment ofthe angular relation of the reflective surfaces and the lamp source isprovided for by a novel arrangement of spring Wire supporting clip thatis pivotally movable on the channel member from a first detent positionwithin the closed case to a second detent position extending out of thecase when opened and bearing against adjacent edge surfaces of the casehalf-section's in a manner to precisely position the angularrelationship between the channel member and the two half-sections of thecase forming the reflective surfaces. This last mentioned spring wiresupporting clip structure is another novel feature of my invention.

Further objects and advantages of my invention will be apparent withreference to the following specification and drawings, in which:

Fig. 1 is a perspective elevational view of the complete portable lampcarrying case and reflector of my invention in the opened or operativeposition and with the plug-in lamp or radiation source, plug-in ballastresistor,- and detachable line cord in their operative positions;

Fig. 2 is a perspective elevational view of the two hinged half-sectionsof the carrying case together with the channel frame member in theiropen or operative positions and with the supporting lamp and ballastsocket element removed for the sake of clarity;

Fig. 3 is a perspective elevation partly broken away of the plug-inballast resistor;

Fig. 4 is an exploded perspective elevation partly in section of theplug-in socket, plug-in lamp, plug-in ballast resistor and detachableline cord to be assembled 3 in the channel frame member of the portablecase shown in Fig. 2;

Fig. 5 is a detailed perspective view partly in section of a preferedembodiment of plug-in health lamp structure for use in the portablecarrying case of my invention;

Fig. 6 is a wiring diagram of the complete lamp structure of myinvention and showing the thermostatic starting switch elementscontained within the outer radiation filtering glass envelope;

Figs. 7, 8 and 9 are top, side section and bottom views respectively ofthe top half of the plug-in socket element;

Figs. 10, 11 and 12 are top, side section and bottom views respectivelyof the bottom half of the plug-in socket element;

Fig. 13 is an exploded View of the electrical connectors and springgrips to be assembled between and within the top and bottom halves ofthe socket element;

Fig. 14 is a perspective view, with parts broken away,

of the bottom half of the plug-in socket element with the electricalconnectors in their assembled position, and

Fig. 15 is a view of the assembled top and bottom halves of the socketelement partly broken away to show the rivet assembly.

Referring to Figs. 1 and 2 of the drawings, the portable carrying caseis comprised of the two half-sections 10 and 11 connected by a pianohinge 12 or the like to be opened to expose the inner reflectivesurfaces 13 and 14 and the radiant energy source or lamp 15 in theiroperative positions. may be provided to be operative to lock the casehalfsections 10 and 11 in the closed position as should be readilyunderstood. If desired, heat insulation 18 may be interposed between thereflective surfaces 13 and 14 and the respective carrying casehalf-sections as shown in Fig. 1.

As more clearly shown in Fig. 2 of the drawings, a channel frame member20 is pivotally carried at 21 and 22 by the piano hinge 12. A tongueprojection 23 of the case half-section 11 and a tongue projection 24 ofthe case half-section 10 project through openings 25 and 2 6respectively of the channel frame member 20 in a manner to inter-connectwith the frame member and limit the opened position of the casehalf-sections 10 and 11 and simultaneously position the channel framemember 20 to an intermediate position between the case halfsections. Thechannel frame member 26 is provided with a lower flange 27 which isadapted to receive the plug-in socket element to be later described indetail but generally shown at 30 in Fig. 1 of the drawings.

As shown in Figs. 1 and 4 of the drawings, the plugin socket element 36is retained in the bottom of the channel frame member 24) as supportedby the flange 27 by means of a spacer element 31 formed of ceramic orother heat resistant material. is provided with a projection 32 adaptedto be received in an aperture 33 of the socket element 30. The other endof the spacer element 31 may be provided with a threaded bushing 34, anda screw 36 is adapted to extend through a metal retaining plate 35, andthe hole 37 60 of the channel frame member 20 into the threaded hole 34of the spacer element 31 to thus retain the spacer element 31 and thesocket 36 in the channel frame member 20. Holes 33 and 39 are providedin the sides of the channel frame member 20 adjacent its upper end andare adapted to receive the formed ends of a spring wire supporting clip40, as shown in Fig. l. The metal retaining plate is provided withnotched edges 35a and 35b respectively on each side to provide springdetent positions for the spring wire supporting clip 40, the notches 35aproviding the detent position for the supporting clip 40 in the open oroperative position, and the notches 35b providing the detent positionfor the spring clip 40 in the position (not shown) for closing the case.It will be noted, as shown in Fig. 1, that A keeper 16 and spring latch17 The spacer element 3.1

the spring clip 40 in the operative position bears against the adjacentedges 41 and 42 respectively of the case half-sections 10 and 11 in amanner to accurately position the angular relationship of the casehalf-sections 1t and 11 and the channel frame member 20. Thus, thegeometrical relationship of the radiation source 15 and the reflectivesurfaces 13 and 14 are accurately determined upon opening the casehalf-sections 1t) and 11 and moving the spring supporting clip 40 to itsopen or operative position. A wire protective guard 41a may be providedto prevent accidental contact with the radiation source 15.

As more clearly shown in Figures 3 and 4 of the drawings, a plug-inballast resistor 45 is adapted to be carried by the plug-in socket 30 ina position between the radiation source 15 and the ceramic spacer 31.The plug-in ballast is formed of two cylindrical sections of ceramicmaterial 46 and 47 containing resistance elements 48 and 49respectively, electrically connected together in series at 50 andconnected at their other ends respectively to plug-in prong connectors51 and 52. The plug-in prong connectors 51 and 52 are adapted to bereceived in suitable spring grip receptacles in the plug-in socket 30 tobe later described in detail.

As shown in Figs. 4, 5 and 6 of the drawings, the radiation sourcegenerally shown at 15 is comprised of an outer glass envelope 55 havingany suitable desired radiation filtering characteristics and fitted withplug-in electrical prong connectors 56, 57 and 58 at one end. Theplug-in prong connector 58 is not electrically connected within thelight source unit 15 and is employed solely for providing the desiredmechanical rigidity and may therefore be omitted if desired. Mountedwithin the outer glass envelope 55 is a smaller arc lamp 60 which may beof the mercury vapor type containing arc electrodes 61 and 62 and a gasionizing filament 63. Suitable insulating spacers 64- and 65 areprovided to support the arc lamp 60 in the desired relationship withinthe glass envelope 55 and in this connection it will be noted that thearc lamp 60 is positioned eccentrically within the envelope 55 to beforwardly positioned as far from the ballast resistor 45 as possiblewhen the radiation source 15 and ballast resistor 45 are plugged intothe socket 30.

Also carried by the upper supporting insulating spacer 65 is athermostatic switch 66 and a thermostat switch heating resistor 67. Theswitch 66 and thermostat heating resistor 67 are connected in serieswith the gas ionizing filament 63 and as such constitute an automaticstarting switch for the arc tube 60. With reference to Fig. 6 of thedrawings, as should readily be understood, alternating current from theline source 70 is initially conected through the ballast resistor 4849,thermostat resistor 67, gas ionizing filament 63 and normally closedthermostatic switch 66. After a short interval of time necessary toprovide ionization of the gas within the vapor arc tube 60, thethermostatic switch 66 is opened due to the heating effect of thecurrent passing through the thermostatic switch heating element 67.Thereafter, with the vapor in the arc tube 60 ionized, an arc dischargetakes place between the arc electrodes 61 and 62.

From the foregoing description, it will be noted that the arc tube 60,thermostatic switch contact 66 and thermostatic heating element 67 areall contained within the outer glass radiation filtering envelope 55 andthat only two electrical connections are made at the base of theenvelope 55. These electrical connections are shown on Figure 6 of thedrawings at 71 and 72 respectively. Similarly, the lamp ballast resistor45 is provided with two electrical connections shown at 72 and 73respectively on Figure 6 of the drawings.

As shown in Fig. 4 of the drawings, the line cord 75 is provided with aconventional plug 76 at one end for connection with the A. C. source 70and with a special receptacle 77 at the other end which is adapted toreceive connector prongs 78 and 79 of the plug-in socket 30. Withparticular reference to Figs. 7 through 15 of the drawings, the plug-insocket 30 will now be specifically described. The socket 30 is composedof a lower section 80 and an upper section 81, the details of the lowersection 80 being shown in Figs. through 14, and the details of the uppersection being shown in Figs. 7 to 9 of the drawing. The upper and lowersections 81 and 80 are adapted to be riveted together by rivets 82 and83, embedded in the upper section 81. One of the riveted connections isshown at 84 in Fig. of the drawings. The upper section 81 of the socketis provided with three openings 85, 86 and 87, adapted to receive springgrip elements 88, 89 and 90, as shown in Figs. 13 and 14 of thedrawings. The spring grip elements 83-90 are in turn adapted to receivethe prong connectors 5658 of the radiation source 15, and anotheropening 91 in the upper socket section 81 is provided to permit theclearance of the glass sealing nipple 92 on the bottom of the outerglass envelope 55, as shown in Fig. 5 of the drawings. The spring gripelement 88 is electrically connected by the metallic bridge 94 with aspring grip element 95 adapted to extend through the opening 96 andreceive one of the prong connections 52 of the ballast resistor 45. Anadditional spring grip element 97 is adapted to extend through theopening 98 of the upper socket section 81 to receive the electricalprong connection 51 of the ballast resistor 45.

Spring grip elements 89 and 97 are also provided with prongs 100 and 191respectively and electrically joined thereto by the metallic bridgeconnections 102 and 103. The prong elements 100 and 101 are adapted toextend through openings 104 and 105 respectively of the lower socketsection 80. The lower surfaces of the upper socket section 81 and theupper surfaces of the lower socket section 80 are recessed as shown toprovide clearance for the connecting elements 94, 102 and 103 and toaccurately position the spring grip elements 88, 89, 90, 95 and 97,together with the prongs 100 and 101 when the upper and lower socketsections 81 and 80 are assembled, as shown in Fig. 15 of the drawings.In such manner the electrical connections for the ballast and radiantenergy source 15 are incorporated in the unitary socket structure 30,thus providing the two electrical contact prongs 100 and 101 forconnection with the receptacle 77 of the line cord 75, the two springgrip elements 95 and 97 for plug-in connection with the ballast resistor45, and further providing the spring grip connections S890 for plug-inconnection of the radiant energy source 15.

The operation of the portable lamp source of my in vention should bereadily apparent from the foregoing description, the operation of thevarious elements of the invention having been previously described inthe course of their specific description. It should be understood thatthe novel arrangement of combined portable carrying case and reflectorarrangement, together with the plug-in lamp and ballast resistor supportof my invention may be readily used with various forms of radiant energy5' sources such as ultra-violet lamps, photo-flood lamps and photo-flashlamps, bearing in mind that the salient features of the invention arethe novel arrangement of the hinged case half-sections and supportingchannel frame member arranged to provide automatic angular positioningof the radiant energy source and reflector elements when in the open oroperative position.

I have also described a novel form of arc vapor lamp in combination witha radiation filtering envelope and thermostatic starting switchstructure arranged for plug in operation and positioned relative to eachother in a manner to insure the most eflicient operation. In thisconnection I have also described anovel form of unitary plug-in socketconstruction for both a plug-in radiation source and a plug-in ballastresistor, the electrical con-- 6 radiation source being provided forwithin the socket structure.

I claim:

1. A combined portable lamp casing and reflector comprising a pair ofcasing half-sections, hinge means pivotally connecting together one sideof each half-section respectively, an upright frame member pivotallyconnected to said hinge means and positioned forwardly of said hingemeans, said frame member being of a height less than said casinghalf-sections and enclosed within the casing formed by the closure ofsaid casing half-sections, means, inter-connecting said casinghalfsections and said frame member and positioned adjacent said hingemeans to position said frame member to an angular position intermediatesaid casing half-sections and directly forward of said hinge means andlimit the open position of said casing half-sections when opened,reflective surfaces on the inside walls of said casing halfsections, anda lamp carried by said frame member.

2. A combined portable lamp casing and reflector comprising a pair ofcasing half-sections, hinge means pivotally connecting together one sideof each half-section respectively, an upright frame member pivotallyconnected to said hinge means and positioned forwardly of said hingemeans, said frame member being of a height less than said casinghalf-sections and enclosed within the casing formed by the closure ofsaid casing half-sections, means inter-connecting said casinghalf-sections and said frame member and positioned adjacent said hingemeans to position said frame member to an angular position intermediatesaid casing half-sections and directly forward of said hinge means andlimit the open position of said casing half-sections when opened, aplug-in lamp unit, a plug-in ballast resistor, a plug-in socketsupported on said frame member having electrical contact openingsreceiving said plug-in lamp unit and said plug-in lamp ballast resistor.

3. A combined portable lamp casing and reflector comprising a pair ofeasing half-sections, hinge means pivotally connecting together one sideof each half-section respectively, an upright frame member pivotallyconnected to said hinge means and positioned forwardly of said hingemeans, said frame member being of a height less than said casinghalf-sections and enclosed within the casing formed by the closure ofsaid casing half-sections, means inter-connecting said casinghalf-sections and said frame member and positioned adjacent said hingemeans to position said frame member to an angular position intermediatesaid casing half-sections and directly forward of said hinge means andlimit the open position of said casing half-sections when opened,reflective surfaces on the inside walls of said casing half-sections, aplug-in lamp unit, a plug-in ballast resistor, a plug-in socketsupported on said frame member and having electrical contact openingsreceiving said plug-in lamp unit and said plug-in lamp ballast resistor.

4. A combined portable lamp casing and reflector comprising a pair ofcasing half-sections, hinge means pivotally connecting together one sideof each half-section respectively, a frame member pivotally connected tosaid hinge means and adapted to be enclosed within the casing formed bythe closure of said casing half-sections, means including at least oneprojecting member from each halfsection projecting through an aperturein said frame member and inter-connecting said casing half-sections andsaid frame member, said projecting members contacting walls forming saidaperture to position said frame memher to an angular positionintermediate said casing halfsections and limit the open position ofsaid casing halfsections when opened, and a lamp carried by said framemember.

5. A combined portable lamp casing and reflector comprising a pair ofcasing half-sections, hinge means pivotally connecting together one sideof each half-section nections for the circuits between the ballastresistor and respectively, a frame member pivotally connected to saidhinge means and adapted to be enclosed within the casing formed by theclosure of said casing half-sections, a spring wire supporting clippivotally connected to said frame member and having two detentpositions, a first detent positioned wherein said clip may be enclosedby said casing halfsections when closed, and a second detent positionedwherein said clip extends outward of said casing half-sections whenopened to engage adjacent edges of said casing half-sections anddetermine the relative angular positions of said casing half-sectionsand said frame member when opened, and a lamp carried by said framemember.

6. A combined portable lamp casing and reflector comprising a pair ofeasing half-sections, hinge means pivotally connecting together one sideof each half-section respectively, a frame member pivotally connected tosaid hinge means and adapted to be enclosed within the casing formed bythe closure of said casing half-sections, means inter-connecting saidcasing half-sections and said frame member to position said frame memberto an angular position intermediate said casing half-sections and limitthe open position of said casing half-sections when opened, a springwire supporting clip pivotally connected to said frame member and havingtwo detent positions, a first detent positioned wherein said clip may beenclosed by said casing half-sections when closed, and a second detentpositioned wherein said clip extends outward of said casinghalf-sections when opened to engage adjacent edges of said casinghalf-sections and determine the relative angular positions of saidcasing half-sections and said frame member when opened, reflectivesurfaces on the inside walls of said casing half-sections, and a lampcarried by said frame member.

7. A combined portable lamp casing and reflector comprising a pair ofeasing half-sections, hinge means pivotally connecting together one sideof each half-section respectively, a frame member pivotally connected tosaid hinge means and adapted to be enclosed within the easing formed bythe closure of said casing half-sections, a spring wire supporting clippivotally connected to said frame member and having two detentpositions, a first detent positioned wherein said clip may be enclosedby said casing half-sections when closed, a second detent positionedwherein said clip extends outward of said casing half-sections whenopened to engage adjacent edges of said casing half-sections anddetermine the relative angular positions of said casing half-sectionsand said frame member when opened, a plug-in lamp unit, a plugin socketsupported on said frame member and having electrical contact openingsreceiving said plug-in lamp unit, and reflective surfaces on the insidewalls of said casing half-sections.

8. A combined portable lamp casing and reflector comprising a pair ofeasing half-sections, hinge means pivotally connecting together one sideof each half-section respectively, a frame member pivotally connected tosaid hinge means and adapted to be enclosed within the casing formed bythe closure of said casing half-sections, means inter-connecting saidcasing half-sections and said frame member to position said frame memberto an angular position intermediate said casing half-sections and limitthe open position of said casing half-sections when opened, a plug-insocket supported on said frame member, a plug-in lamp unit in saidsocket, said lamp unit having an outer glass radiation filteringenvelope, and an arc tube within said envelope.

9. A combined portable lamp casing and reflector comprising a pair ofeasing half-sections, hinge means pivotally connecting together one sideof each half-section respectively, a frame member pivotally connected tosaid hinge means and adapted to be enclosed within the casing formed bythe closure of said casing half-sections, a plugin socket supported onsaid frame member having electrical contact openings for receiving aplug-in lamp unit and a plug-in lamp ballast resistor, a plug-in lampunit in said socket, said lamp unit having an outer glass radiationfiltering envelope, and an arc tube within said envelope, and a plug-inballast resistor in said socket, said are tube being eccentricallypositioned within said envelope to be away from said ballast resistor.

10. A combined portable lamp casing and reflector comprising a pair ofcasing half-sections, hinge means pivotally connecting together one sideof each half-section respectively, an upright frame member pivotallyconnected to said hinge means and positioned forwardly of said hingemeans, said frame member being of a height less than said casinghalf-sections and enclosed Within the casing formed by the closure ofsaid casing halfsections, a plug-in lamp unit, a plug-in ballastresistor, a plug-in socket supported on said frame member havingelectrical contact openings for receiving said plug-in lamp unit andsaid plug-in lamp ballast resistor, said ballast resistor beingpositioned between said lamp unit and said frame member.

11. A combined portable lamp casing and reflector comprising a pair ofcasing half-sections, hinge means pivotally connecting together one sideof each half-section respectively, a frame member pivotally connected tosaid hinge means and adapted to be enclosed within the casing formed bythe closure of said casing half-sections, a plugin lamp unit, a plug-inballast resistor, a plug-in socket supported on said frame member havingelectrical contact openings through the upper surface thereof forreceiving said plug-in lamp unit and said plug-in lamp ballast resistor,an electrical plug-in line cord in the bottom of said socket, said lampunit having an outer glass radiation filtering envelope and an arc tubewithin said envelope, said are tube being eccentrically positionedwithin said envelope away from said ballast resistor, said ballastresistor being positioned between said lamp and said frame member.

12. A combined portable lamp casing and reflector comprising a pair ofeasing half-sections, hinge means pivotally connecting together one sideof each half-section respectively, a frame member pivotally connected tosaid hinge means and positioned to be enclosed within the casing formedby the closure of said casing half-sections, a plug-in lamp unit, aplug-in line cord, a plug-in socket supported on said frame memberreceiving said plug-in lamp unit and said plug-in line cord, saidplug-in socket comprises an upper section and a lower section fastenedtogether with a plurality of spring grip members and electricalconnecting elements therebetween, the upper section having openingsthrough which said spring grip members extend to receive the plug-inlamp unit, the lower section having extending therefrom a plurality ofbayonet prongs to engage the plug-in line cord, said electricalconnecting elements being connected between said prongs and said springgrip members to complete a circuit through the plug-in lamp unit.

13. A combined portable lamp casing and reflector comprising a pair ofeasing half-sections, hinge means pivotally connecting together one sideof each half-section respectively, an upright frame member pivotallyconnected to said hinge means and positioned forwardly of said hingemeans, said frame member being of a height less than said casinghalf-sections and enclosed within the casing formed by the closure ofsaid casing half-sections, a p1ug-in lamp unit, a plug-in line cord, aplug-in ballast resistor, a plug-in socket supported on said framemember receiving a plug-in lamp unit, said plug-in line cord and saidplug-in ballast resistor.

14. The invention of claim 13 wherein said plug-in socket comprises anupper section and a lower section fastened together with a plurality ofspring grip members and electrical connecting elements therebetween, theupper section having openings through which spring grip members extendto receive the plug-in lamp unit and plug-in ballast resistor, the lowersection having extending therefrom a plurality of bayonet prongs toengage the plug-in nected between said prongs and said spring gripmembers to complete a circuit through said lamp, and said ballast.

657,590 References Cited in the file of this patent 5 UNITED STATESPATENTS 1 ,083,442 Engfer Ian. 6, 1914 10 Furedy Aug. 24, 1943 FOREIGNPATENTS France May 24, 1929 OTHER REFERENCES Catalogue, L & C MayersCo., 5th Ave., New York, page 283, 1942, D. E. Health-Aid Lamp.

